BNL, Upton, New York
First priority
RIKEN/RARF/CC, Saitama
BNL, Upton, Long Island, New York
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| TUXM01 | Ultra Low Emittance Light Sources | 988 |
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The talk will cover the special issues for reaching sub-nm emittance in a storage ring. Effects of damping wigglers, intra-beam scattering and life-time issues, instabilities, dynamic aperature optimisation, control of optics, dispersion and orbit correction. Results and example of upgrades to existing machine and NSLS-II and Petra-III should be given.
First priority |
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Slides | |
| WEPC131 | Insertion Devices for NSLS-II Baseline and Future | 2314 |
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| NSLS-II is going to employ Damping Wigglers not only for emittance reduction but also as broadband hard X-ray source. In-Vacuum Undulators with minimum RMS phase error (< 2 degree) and possible cryo-capability are planned for X-ray planar device, and Elliptically Polarized Undulators are utilized for polarization controls. Due to lack of hard X-ray flux from weak dipole field (0.4 Tesla), three pole wigglers of peak field over 1 Tesla will be mainly used by NSLS bending magnet beam line users. Magnetic designs and kick maps for dynamic aperture surveys were created using the latest version of Radia for Mathematica 6 which we supported the development. There are other devices planned for later stage of the project, such as quasi-periodic EPU, superconducting wiggler/undulator, and Cryo-Permanent Magnet Undulator with Praseodymium Iron Boron (PrFeB) magnets and textured Dysprosium poles. For R&D, Hybrid PrFeB arrays were assembled and field measured at room temperature, liquid nitrogen and liquid helium temperature using our vertical test facility. We have also developed a specialized power supply for pulsed wire measurement. |